The Tiger PDU-A30U advanced water boiler and heater features a large LCD control panel for easy operation. With 4 different temperature set controls, 2 sleep timer settings (6 or 9 hours) for energy savings, and a re-boil function to quickly bring water back to boiling. The pre-selected timer allows water to boil at the temperature desired at the perfect time needed. The built-in auto lock function prevents water from dispensing automatically for safety purposes. Other features of this hot water dispenser include an energy saving setting and a safety shut-off when low water levels are detected in the unit. The removable lid and citric acid cleaning function makes for easy cleaning. The power cord can also be removed for safety and convenience. The Tiger PDU-A30U advanced water boiler and heater is spill proof and leak proof.